ISL6520A_07 Datasheet, PDF (3/12 Pages) Intersil Corporation – Single Synchronous Buck Pulse-Width Modulation (PWM) Controller

Block Diagram
SAMPLE
AND
HOLD
ISL6520A
+
-
OC
COMPARATOR
V_CC
POR AND
SOFTSTART
+
0.8V
-
FB
COMP/OCSET
20μA
Typical Application
ERROR
AMP
+
-
PWM
COMPARATOR
+
-
GATE
CONTROL
PWM ^LOGIC VCC
OSCILLATOR
FIXED 300kHz
V_CC
GND
C_DCPL
C_BULK
R_OCSET
VCC
5
BOOT
1
COMP/OCSET _{7 ISL6520A 2} ^UGATE
R_F
8 ^PHASE
C_I
C_F
63
4 ^LGATE
FB
GND
D_BOOT
C_HF
C_BOOT
L_OUT
C_OUT
R_OFFSET
R_S
+V_O
BOOT
UGATE
PHASE
LGATE
3
FN9016.5
March 28, 2007